Long-term capability of polymer-coated surface transverse wave sensors for distinguishing vapors of similar hydrocarbons

Stahl, Ullrich; Voigt, A.; Dirschka, M.; Barie, N.; Richter, Christiane; Waldbaur, Ansgar; Gruhl, Friederike J.; Rapp, Bastian E.; Rapp, M.; Länge, Kerstin

doi:10.1016/j.snb.2018.08.013

Cited by 5 publications

(4 citation statements)

References 19 publications

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“…87 Stahl et al used even more polymers, coating each of the eight SAW devices in their array with a different polymer, to create high sensitivity to multiple VOCs (10−100 kHz/ppm). 97 The primary achievement of this work is that after a year of use the devices showed almost no diminishing sensitivity. DiPietrantonio et al used SAW devices with several polymers (PECH, PIB, PEI) and deposited them using laser-induced forward transfer.…”

Section: ■ Mass Sensorsmentioning

confidence: 92%

“…Dong et al also used three types of polymers (polyethylene glycol, polyethylene vinyl acetate, poly(vinyl alcohol)) on cantilevers, and the resulting sensor could identify more VOCs at much higher concentrations (500–30 000 ppm) . Stahl et al used even more polymers, coating each of the eight SAW devices in their array with a different polymer, to create high sensitivity to multiple VOCs (10–100 kHz/ppm) . The primary achievement of this work is that after a year of use the devices showed almost no diminishing sensitivity.…”

Section: Sensitizersmentioning

confidence: 99%

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Review of Gravimetric Sensing of Volatile Organic Compounds

2020

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Volatile organic compounds (VOCs) are pervasive in the environment. Since the early 1980s, substantial work has examined the detection of these materials, as they can indicate environmental changes that can affect human health. VOCs and similar compounds present a very specific sensing problem in that they are not reactive and often nonpolar, so it is difficult to find materials that selectively bind or adsorb them. A number of techniques are applied to vapor sensing. High resolution molecular separation approaches such as gas chromatography and mass spectrometry are well-characterized and offer high sensitivity, but are difficult to implement in portable, real-time monitors, whereas approaches such as chemiresistors are promising, but still in development. Gravimetric approaches, in which the mass of an adsorbed vapor is directly measured, have several potential advantages over other techniques but have so far lagged behind other approaches in performance and market penetration. This review aims to offer a comprehensive background on gravimetric sensing including underlying resonators and sensitizers, as well as a picture of applications and commercialization in the field.

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Section: ■ Mass Sensorsmentioning

confidence: 92%

Section: Sensitizersmentioning

confidence: 99%

Review of Gravimetric Sensing of Volatile Organic Compounds

2020

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“…It was shown that the ability of the polymer layers to distinguish between three VOCs of different classes, i.e., a chlorinated aliphatic compound, an aliphatic hydrocarbon, and an aromatic hydrocarbon, was maintained for at least three years. Furthermore, the ability to distinguish between similar VOCs from the same class, i.e., between two aliphatic hydrocarbons or two aromatic hydrocarbons, lasted for at least one year [38,150].…”

Section: Saw Multi-sensor Arraysmentioning

confidence: 99%

Bulk and Surface Acoustic Wave Sensor Arrays for Multi-Analyte Detection: A Review

Länge

2019

Sensors

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Bulk acoustic wave (BAW) and surface acoustic wave (SAW) sensor devices have successfully been used in a wide variety of gas sensing, liquid sensing, and biosensing applications. Devices include BAW sensors using thickness shear modes and SAW sensors using Rayleigh waves or horizontally polarized shear waves (HPSWs). Analyte specificity and selectivity of the sensors are determined by the sensor coatings. If a group of analytes is to be detected or if only selective coatings (i.e., coatings responding to more than one analyte) are available, the use of multi-sensor arrays is advantageous, as the evaluation of the resulting signal patterns allows qualitative and quantitative characterization of the sample. Virtual sensor arrays utilize only one sensor but combine it with enhanced signal evaluation methods or preceding sample separation, which results in similar results as obtained with multi-sensor arrays. Both array types have shown to be promising with regard to system integration and low costs. This review discusses principles and design considerations for acoustic multi-sensor and virtual sensor arrays and outlines the use of these arrays in multi-analyte detection applications, focusing mainly on developments of the past decade.

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“…Later on, the investigations on the differences between STW and Rayleigh wave (Auld et al, 1982), the propagation characteristics of STW under period and non-period structures (Baghai-Wadji et al, 1988;Danicki, 1983;Ronnekleiv, 1986;Thompson, Auld, 1986), and the development and fabrication of STW-based resonators (Auld, Thompson, 1987;Bagwell, Bray, 1987;Flory, Baer, 1987;Strashilov et al, 1997) have been carried out as well. Recently, related micro-strain sensors (Fu et al, 2016), torque sensors (Ji et al, 2016), vapor sensors (Stahl et al, 2018) and resonators (Doberstein, Veremeev, 2019) have been reported. It has been shown that the STW-based devices not only can achieve a higher Q-factor but also have extraordinary sensitivity and nonlinearity than their counterparts.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Propagation Characteristics of Surface Transverse Wave Considering Various Quartz Substrate and Electrode Configurations

2023

Archives of Acoustics

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Long-term capability of polymer-coated surface transverse wave sensors for distinguishing vapors of similar hydrocarbons

Cited by 5 publications

References 19 publications

Review of Gravimetric Sensing of Volatile Organic Compounds

Review of Gravimetric Sensing of Volatile Organic Compounds

Bulk and Surface Acoustic Wave Sensor Arrays for Multi-Analyte Detection: A Review

Numerical Investigation of the Propagation Characteristics of Surface Transverse Wave Considering Various Quartz Substrate and Electrode Configurations

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